<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>品牌列表案例</title>
    <link rel="stylesheet" href="./lib/bootstrap.css">
    <link rel="stylesheet" href="./css/brandlist.css">
</head>

<body>

    <div id="app">
        <!-- 卡片区域 -->
        <div class="card">
            <div class="card-header">
                添加品牌
            </div>
            <div class="card-body">
                <!-- 添加品牌的表单区域 -->
                <!-- form 表单元素有 submit 事件 -->
                <form @submit.prevent="add">
                    <div class="form-row align-items-center">
                        <div class="col-auto">
                            <div class="input-group mb-2">
                                <div class="input-group-prepend">
                                    <div class="input-group-text">品牌名称</div>
                                </div>
                                <input type="text" class="form-control" placeholder="请输入品牌名称" v-model.trim="brand">
                            </div>
                        </div>
                        <div class="col-auto">
                            <button type="submit" class="btn btn-primary mb-2">添加</button>
                        </div>
                    </div>
                </form>
            </div>
        </div>

        <!-- 表格区域 -->
        <table class="table table-bordered table-hover table-striped">
            <thead>
                <tr>
                    <th scope="col">#</th>
                    <th scope="col">品牌名称</th>
                    <th scope="col">状态</th>
                    <th scope="col">创建时间</th>
                    <th scope="col">操作</th>
                </tr>
            </thead>
            <tbody>
                <tr v-for="item in list" :key="item.id">
                    <td>{{ item.id }}</td>
                    <td>{{ item.name }}</td>
                    <td>
                        <div class="custom-control custom-switch">
                            <!-- 使用 v-model 实现双向数据绑定 -->
                            <input type="checkbox" class="custom-control-input" :id="'cb' + item.id"
                                v-model="item.status">
                            <!-- 使用 v-if 结合 v-else 实现按需渲染 -->
                            <label class="custom-control-label" :for="'cb' + item.id" v-if="item.status">已启用</label>
                            <label class="custom-control-label" :for="'cb' + item.id" v-else>已禁用</label>
                        </div>
                    </td>
                    <td>{{ item.time | dateFormat}}</td>
                    <td>
                        <a href="javascript:;" @click="remove(item.id)">删除</a>
                    </td>
                </tr>
            </tbody>
        </table>
    </div>

    <script src="./lib/vue-2.6.12.js"></script>
    <script src="./lib/dayjs.min.js"></script>
    <script>
        //声明格式化时间的全局过滤器
        Vue.filter('dateFormat', (time) => {
            //1.对time进行格式化处理,得到 YYYY-MM-DD HH:mm:ss;
            //2.把格式化结果return出去

            //直接调用 dayjs() 得到的是当前时间,dayjs(给定时间)得到指定日期
            const dtStr = dayjs(time).format('YYYY-MM-DD HH:mm:ss')
            return dtStr
        })
        const vm = new Vue({
            el: '#app',
            data: {
                brand: '',
                nextId: 4,
                list: [
                    //品牌的列表数据
                    { id: 1, name: "宝马", status: true, time: new Date() },
                    { id: 2, name: "奔驰", status: false, time: new Date() },
                    { id: 3, name: "奥迪", status: true, time: new Date() }
                ]
            },
            methods: {
                // 点击链接删除对应品牌
                remove(id) {
                    this.list = this.list.filter(item => item.id !== id)
                },
                // 阻止表单的默认提交行为之后，触发 add 方法
                add() {
                    //如果判断到 brand 的值为空字符串,则return出去
                    if (this.brand === '') return alert('必须填写品牌名称')
                    //如果没有被return出去,执行添加逻辑
                    //1.先把要添加的品牌对象,整理出来
                    const obj = {
                        id: this.nextId,
                        name: this.brand,
                        status: true,
                        time: new Date()

                    }
                    //2.往this.list数组中 push 步骤1 中得到的对象
                    this.list.push(obj)
                    //3.清空 this.brand ;让 this.nextId 自增1
                    this.brand = ''
                    this.nextId++

                }
            },
        })
    </script>
</body>

</html>